Tool holder



" mmh 5,1929. w. J. mmm i 1304.395

'rooL nownn Filed April 16. 1927 -J' MED NNELL.

[AAC

Patented Miar. 5, 1929.

UNITED STATES WALTER J. nccoNNELL, or czLnvnLarm,` omo.

rooL HOLDER.

Application led April 16,

This invention relates to improvements in tool holders, of the class used on automatic and hand screw machines or lathes,`on which a stationary tool holder clamped on a sliding /loclr or carriage and operates back and iorth in makin g cuts on rods or pieces of work rotating in the machine.

An object ot the invention is to provide a compact tool holder which may readily be adj'usted to right or left hand position, which may be used :for narrow spacing ot' cooperating tools, and which in a pair may be used tor readily clamping special tools of greater width.

Another Vobject is to provide a practical, simple, universal, wide or narrow straight blade holder which is economical in cost, and which can be used as stated as a right or lei't hand holder and in which it is possible to invert the holder and use it with the work rotating in the opposite direction. Also, a fiat straight blade of any width may be held by inserting the edges thereof between two of the holders and drawing the holders together to clamp the same.

The invention will be readily understood from the accompanying drawings, in which l is a perspective view of the tool holder;

2, a plan view thereof with a tool therein; Fig. 3, is a section on line 3-3 of Fig. 2; Fig. 4 is a side view of Fig. 3; Fig. 5 is a top view of two tool holders narrowly spaced apart in left and right handed positions; Fig. 6 is av lan view partly in section of two tool hol ers in cooperative position for clamping a relatively wide tool; and Fig. 7 is a section on line 7-7 of Fig. 6.

The holder comprises a compact body or block 2 the side face of which is provided with a groove or slot 3 for the tool 6 and the lower face of this groove is slightly inclined (7 degrees) or dovetailed to snugly t the tool which also is inclined on its lower face.

Two pairs of set screws fl are tapped into the top of the block and are aligned with the middle of said groove and are arranged symmetrically to clamp the tool at or close to both or either' end so that a short tool 6 may be used as shown in Fig. 5. Through the rear wall of the groove extend three adjusting screws 7. ad3ustable from the side of the holder for quick and accurate alignment of the tool to any desired position. There are also two holes 8 extending vertically through the block for clamping the same to the slide w27. serial No; 154,305.`

9 by the customary T-slot clamping devices l2 and these two holes are symmetrically arranged to permit a horizontal turn of 180 degrees of the holder for opposite handed work as especially shown in Fig. 5. Finally. three horizontally arranged clamping holes 10 are ].irovided to clamp two of the holders rigidly together by bolts 1l. This arrangement is especially usable when two tool holders faced, or in opposite arrangement, are used for clamping a single wide tool, see Figs. 6 and 7. These clamping holes and bolts are arranged above and below the groove 3 in Whichthe tool is clamped so that bolts 1l may connect the holders, spaced by the tool itself, rigidly together and prevent a movement of the tool in said groove even if the whole outfit is taken down from the slide 9. Therefore such an outtit may be quickly mounted and demounted or other combinations of several tool holders may be built up as a single unit.

Among the advantages of this invention the following may be mentioned; with a tool placed at the side face of the holder, with no supports, projections or screw heads extending out beyond the tool, it is possible to use two or more holdersclose together on the same slide. As the holder is symmetrical or similar at both ends it is possible to use the holder either right or left hand by simply turning it endfor end. lith the beveled tool slot the tool will always set itself in the same position when replacing. The tool slot is cut clear across the holder, which makes it possible to start the tool cutting on the work, then to remove the tool for grinding or renewing and then return the tool to exactly the original position, by simply looseningthe set screws 4 on the top of the holder and sliding the tool back out of the holder. By the use of the clamping bolts 11 it is possible to use i a tool of any width, by clamping two holders together with the tool between them and then fastening the set screws 4 on the top of the holder. By the use of the blind screws 7 at` the side of the slot it is possible to adjust a tool for any desired taper and alignment. Various other advantages will be apparent to those skilled in the art.

The invention isnot limited to the articular form shown, but various modi cations may be made within the scope of the followin;l claims.

I claim:

l. The combination with a tool, of a pair of holders having grooves facing one ana tool groove across one side face thereof7 10 other in which opposite edges of the tool are screws to clarnp a tool n the groove? tapped clamped and bolts connecting the holders. into the top and side of the block and vertical 2. The combination With a tool of a pair of and horizontal holes extending through the holders having grooves facing one another in block, for the purposes stated. Y which opposite edges of the tool are clamped, In testimony whereof, I do alli); my sig- 15 and bolts connecting the holders both above nature. and below the tool.

3. A tool holder col'nprisng a block having WALTER J. MCCONNELL. 

